(General)
Your familiarity with a specific type of armor increases the amount of protection you receive from it.
Prerequisites
Base attack bonus +1, proficiency with selected armor.
Benefit
Select one type of armor, such as chain shirt or splint mail. The AC bonus granted by the selected armor increases by 1.
Special
You can gain this feat multiple times. Its effects do not stack. Each time you take the feat, it applies to a new type of armor. The
Armor Focus feat counts as the armor training class feature for the purpose of armor mastery feat prerequisites and determines what types of armor you can use with armor mastery feats.